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[ScreenOS] Juniper Firewall sends 'device changed' flag to NSM after NTP sync

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Article ID: KB13145 KB Last Updated: 17 Jun 2010Version: 2.0
Summary:
Juniper Firewall sends 'device changed' flag to NSM after NTP sync
Symptoms:
In an NSRP cluster, the Primary and Backup firewalls keep sending 'device changed' flag to NSM at the NTP interval, disregarding what value it is configured.
Solution:
Root cause: The Primary firewall is sending a NTP sync command through the NSRP link after syncing with the NTP server. When the Backup firewall receives the NSRP sync message, it takes the command as a manual change in itself, and it sends out a 'device change' flag to NSM.

The solution is to configure each NSRP cluster member to sync with the NTP server individually, then apply command 'set ntp no-ha-sync' to block the NTP sync from the Primary. 

Also see: KB7009 - Recommendation to disable NTP update to the member(s) in NSRP environment
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